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Avalanche Forecast

Archived

Jan 27th, 2013–Jan 28th, 2013

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Kananaskis.

Not much in the way of deep powder turns right now but travel is rather easy!  This weak areas surrounding the lens of hard slabs are places to be wary of.  See video here for discussion.

Weather Forecast

A low pressure system off the Gulf of alaska will begin to work its way towards Alberta overnight on Sunday.  Snow is forecast to begin late in the day on monday and some models are predicting that there may be an upslope component to this storm so the front ranges may see some accumulations (HWY40).  Total accumulations are only forecast to be 5-10cm on Monday.  Winds will remain at light to moderate out of the NW but on Tuesday a trailing warm front will cause the winds to increase into the Strong range. 

Avalanche Summary

A recent size 3 cornice triggered avalanche was observed on a N aspect at 2700m on one of the back bowls on Mt Rundle. 

Snowpack Summary

LIttle change over the past 24hrs.  Light snowfalls continued throughout the day with minimal accumulation.  Winds were generally calm except at higher elevations.  Storm slabs continue to build at ridgelines and in immediate lees but these slabs are not that thick and they do not extend to far downslope. 

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.